I'm not saying this will work for everyone but it worked for me an my bf so far:) We share an Xbox, he downloaded the DLC and it worked for him and not for me. This how we fixed it! 1. Sign in as the profile you want to use. 2. Plug second controller in and sign in with the person who has the DLC whilst the other account is still signed in (hope this makes sense) 3. So at the moment both accounts are online and the person with the DLC is on the title screen for destiny. Press A on the controller with the account you want to use and continue to the destination screen (map screen) you should see all of the TTK things unlocked. 4. Go to the tower and buy something from the vanguard that's for the new DLC. 5.get the person with the DLC to sign out by pressing the middle button. 5. Get them to turn their controller off and unplug it quickly. Done! You're in! I hope this helps! It's worked for me. I haven't turned my Xbox off yet to see if it remembers that I have the DLC but at least you can play:)